How many clicks up is a stop?

[bphillips330]

Ok for a person who has a great grasp on photography, I am giong to ask a very basic question :oops:. For some reason I am confused, or I might have been wrong?

Lets say I am at f8 and I move to f16 ( I don't have my camera with me , I belive that is the next number ) is that one stop of light? For every click I move the fstop, is that one stop i guess?

With every click up on shutter speed, is that one stop? or a third stop?

Last question, is it a direct correlation between moving fstop and shutter? I mean, if i move the f-stop one click more open, and i clicked shutter one click faster, to compensate for the more light. I think i am clear on this? One click "down" on f-stop = one "click" up on shutter?

I thought I understood this, I think I am right. But I was just reading another thread about sunny 16 rule and got me a smidgen confused.

[Hermeto]

One click is either 1/3 or 1/2 of a stop, depens on C.Fn. settings.

[SkipD]

Standard f-stop numbers, all one stop apart from the one to the next, are f/1.0, f/1.4, f/2.0, f/2.8, f/4.0, f/5.6, f/8, f/11, f/16, f/22, f/32, etc.

To calculate a full-stop change from any f-stop number, multiply or divide (depending on the direction of change) the current f-stop number by 1.414 (actually, the square root of 2).

To change shutter speeds and ISO settings by a full stop, multiply or divide the current shutter speed or ISO value by 2.

[neumanns]

F8-F16 is two stops.

F8-F11 is one stop...If you have your camera setting's at default it should be three clicks.

Unless you are like me, I usally go the wrong way...In that case it will be 9 clicks. (three the wrong way, three back to where you started, three more to get to where you wanted to be)

[Colorblinded]

Unless you are like me, I usally go the wrong way...In that case it will be 9 clicks. (three the wrong way, three back to where you started, three more to get to where you wanted to be)
:lol: Been there, done that!

To the OP, all whole f-stops (halving or doubling the transmitted light) are separated by a factor of 1.4. This is because the aperture value is the ratio of the focal length over the diameter of the adjustable opening in the lens. The meaning of going from f/8 to f/11 means you have halved the overall area of the opening in the lens, which is a factor of two. Because the f# is dependent on the diameter or radius of the lens, its relationship to the area is the square root of the change in area (because area is pi*r^2). Increasing the physical size of the opening has the effect of decreasing the f#.

You'd have either 4 or 6 "clicks" of the wheel to reach f/16 from f/8 depending on what your custom functions are set for.

[bphillips330]

and 1 stop is 10 times more light then the stop before it?

[qtaran111]

Unless you are like me, I usally go the wrong way...In that case it will be 9 clicks. (three the wrong way, three back to where you started, three more to get to where you wanted to be)

lol, yep me too :)

[Colorblinded]

and 1 stop is 10 times more light then the stop before it?
No, it's twice.

One stop doubles or halves the size of the opening in the lens, thus a doubling or halving of the amount of light that passes through the lens.

[Ballen Photo]

and 1 stop is 10 times more light then the stop before it?
One full stop in either direction is either "doubling" or "halving" the amount of light let in for the exposure. ;)
-Bruce